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We typically start with the data matrix, a rectangular array of rows and columns. If we type its name on the R command line, it will show itself. But the data matrix is hard to read, even when there are not many rows or columns. The heat map is a visual alternative. All you need is the R function...

We recently uploaded on http://hal.archives-ouvertes.fr/hal-00725090 a revised version of our work, with Ewen Gallic (a.k.a. @3wen) on Visualizing spatial processes using Ripley’s correction: an application to bodily-injury car accident location In this paper, we investigate (and extend) Ripley’s circumference method to correct bias of density estimation of edges (or frontiers) of regions. The idea of the method was theoretical...

In the last days I was thinking about about how researchers could collaborate efficiently with their experts in statistics. With the increasing complexity in science, interchanging information can be crucial to get the best results. But what happens when a … Sigue leyendo →

I grew up in Australia, where I learned to speak English. Or so I thought: when I moved overseas to the UK, and especially when I moved to the States, I soon learned these are distinct cultures separated by a common language. Words which I previously had no context for being different anywhere else, such as "runners" ("sneakers"), "lemonade"...

I am not sure how many of you have seen this Business Insider article. It is basically about a shiny app created by Joshua Katz as NC State. It is really fun playing with shiny app.With nearly a million facebook likes this web app buil...

Number of tweets in different languages posted around GermanyThere are many thing one can do with tweets (sentiment analysis, maps, ...). This entry shows you how you can access the publicly available API using Java and how to analyse the data using R....

Languages tweeted around Germany: red, blue, green, yellow, grey are for German, French, English, Dutch and other respectively. See here for a zoomable version.Motivated by the project twitter languages of New York I wanted to...

A common problem when trying to show data is that the attributes that you want to map for comparison are stored in multiple rather than single variables. For example, proportion of employment by type. This practical will achieve tis using … Continue reading →

Twitter has become an important communications tool for political protests. While mass media are often censored during large-scale political protests, Social Media channels remain relatively open and can be used to tell the world what is happening and to mobilize support all over the world. From an analytic perspective tweets with geo information are